Mug tree



FIG. 1 is a top, front, and left perspective view of a mug tree showingmy new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side and a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for an mug tree, as shown and described.